Initial Inspection and Diagnostic Overview

1. Check Fuse 22 by operating the Trunk Release. Check Fuse 17 by visual inspection.
2. Compressor Operation: Turn Ignition Switch to RUN but do not start engine. Put Mode Selector to OFF then to MAX.

^ A click can be heard when clutch engages.
^ Move Mode Selector between OFF and MAX several times to verify that clutch engages in MAX position. Clutch plate movement can be seen on the front of the Compressor Pulley.
^ If clutch does not engage, proceed to Step 4.

3. Start the engine and put Mode Selector in MAX to engage the clutch.

^ Check that engine cooling fan runs when compressor is engaged.
^ Check that air moves freely through condenser.
^ If fan does not run refer to Cooling System/Testing and Inspection/Procedures/Coolant Fans .
^ Feel the suction (cold) and output (warm) pipes of the compressor. If there is not a wide temperature difference after the compressor has run for several seconds, Check for proper refrigerant charge.

4. Turn Ignition Switch OFF.

^ Check refrigerant pressure at the low side service fitting.
^ If pressure is less than 172 kPa (25 psi), check for proper refrigerant charge.
^ If refrigerant pressure is higher than 172 kPa (25 psi), complete all Diagnostic Test. Testing and Inspection